石墨烯氧化物板的尺寸分化通过pH辅助的选择性沉积
Xiluan Wang1, Hua Bai, Gaoquan Shi
1Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China.
Journal of the American Chemical Society
|April 1, 2011
概括
研究人员开发了一种简单的方法来按尺寸分离氧化石墨烯 (GO) 板. 较大的GO板 (f1) 与较小的GO板 (f2) 相比,具有更好的导电性和机械性能.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 化学工程是化学工程的重要组成部分.
背景情况:
- 石墨烯氧化物 (GO) 是一种来自石墨的有希望的材料.
- 控制GO板的侧面尺寸对于优化其性能至关重要.
- 现有的GO板材分离方法可能是复杂和低效的.
研究的目的:
- 开发一种简单,可扩展和环保的方法,用于大小分割石墨烯氧化物板.
- 为了研究侧面尺寸对减少氧化石墨烯 (rGO) 薄膜性能的影响.
主要方法:
- 使用在pH值4.0的选择性沉进行水性石墨烯氧化物分散的尺寸分化.
- 分成两个部分:大侧面维度 (f1) 和小侧面维度 (f2).
- 使用朗迈尔-布洛杰特 (LB) 和过技术制备和表征减少的氧化石墨烯 (rGO) 薄膜.
主要成果:
- 选择性沉方法有效地根据侧面尺寸 (>90%大于40μm2的f1) 来分离GO板.
- 与f2相比,f1的氨酸减少的LB薄膜具有显著更高的电导率.
- 过准备的f1片显示出较小的d空间,更高的抗拉强度和更高的模量,比f2片.
结论:
- 开发的单步大小分成方法对于石墨烯氧化物板来说是简单,具有成本效益,高效和可扩展的.
- 较大的石墨烯氧化物板 (f1) 产生较少的石墨烯氧化物薄膜,具有增强的电气和机械性能.
- 这种取决于尺寸的性能增强为量身定制的氧化石墨烯应用开辟了道路.
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